Merge pull request doxygen#11334 from marktsuchida/layout-redundant-attrs

Remove redundant 'visible' attrs in layout

Author: doxygen

templates/general/layout_default.xml

@@ -120,7 +120,7 @@
       <functions visible="yes" title=""/>
       <variables visible="yes" title=""/>
       <properties visible="yes" title=""/>
-      <membergroups visible="yes" visible="yes"/>
+      <membergroups visible="yes"/>
     </memberdecl>
     <detaileddescription visible="yes" title=""/>
     <memberdef>
@@ -168,7 +168,7 @@
       <functions visible="yes" title=""/>
       <variables visible="yes" title=""/>
       <properties visible="yes" title=""/>
-      <membergroups visible="yes" visible="yes"/>
+      <membergroups visible="yes"/>
     </memberdecl>
     <detaileddescription visible="yes" title=""/>
     <memberdef>